Guess the Guru's Number

Thinking & Engaging
Thinking & Engaging
Numeracy
Numeracy

Participants try to guess the number that another participant (Number Guru) is thinking of that will be between 1 to 100.

Materials

  • Paper
  • Pencil/pen

Framing

Can you guess the guru’s number?

Instructions

  1. Participants will be in their groups of 3-4.
  2. One participant will start as the Number Guru. The other 2-3 participants will be trying to guess the number the Number Guru is thinking of between 1 to 100.
  3. The Number Guru will think of a number and write it down on a piece of paper, but so that none of the other participants can see.
  4. The other participants will then write down 3 questions for the Number Guru. Each question has to be a yes or no question. They can write all three at once, or one at a time. Examples of questions are:

    - Does it start with a 3?
    - Does it end with a 5?
    - Is it an odd number?
    - Is it higher than 40?
    - Is it lower than 30?
    - Can it be divided by 5?

  5. When they write down a question, they will give it to the Number Guru who will write yes or no next to the question.
  6. When a participant has asked their 3 questions, they begin to guess the Guru’s number. They have 5 guesses.

    - They will write “#1” and write their first guess next to it.
    - They will give it to the Guru who will put an up arrow (the number is higher than the guess), or a down arrow (the number is lower than the guess).
    - Then the participant will write #2 and put their second guess.

  7. The participant to get it correct on the least amount of guesses wins that round and is the new Number Guru.
  8. If no participant got it right after 5 guesses, each participant is allowed to ask one more question, and get 5 more guesses.

Modify

  • Allow participants to ask more questions at the start.
  • Participants ask their questions out loud.
  • Participants will be in two groups and the group to guess the right number first gets a point for their group.
  • Number is between 1 and 50.

Safety

  • There are no foreseeable safety concerns for this activity.

Wrap-up

No wrap-up is necessary for this activity.



Adapted from: http://activeafterschool.ca/activities/guess-gurus-number